Improvement in seal-bolts



1. E. THOMSON.

v Seal-Bulcs. N01 144,370, Patented Nov. 4,1873.

Wiesi riventor.

UNITED STATES PATENT O FICE.

JAMES E. THOMSON, OF BUFFALO, NEW YORK.

IMPROVEMENT IN SEAL-BOLTS.

Specification forming part of Letters Patent No. 144,370, dated November 4, 1873; application filed April 22, 1873. a

(Lisa B.

To all whom it may concern: Be it known that I, JAMES E. THOMSON, 0

Buffalo, Erie county, New York, have invented a new and Improved Seal-Lock; and I hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings making a part of this specification, in which Figure l is a plan of the lock. Fig. 2 is a vertical section. Figs. 3 4 5 6 are details to be referred to. Y

In order that those skilled in the art may make and use my invention, I will proceed to describe the manner in which I have carried it out.

In the said drawings, A is the bolt-piece, made of metal, either stamped or cast in the shape shown, and having in it a hole, a, and an enlargement or head, I), at its end. If. desirable, the head b may have a transverse rib (not shown) upon it in order to strengthen it. A piece of metal, B, is bent, with a portion, 0, at right angles to the portion 0. The two pieces A and B are joined together, at d, by a rivet, so that the piece B can revolve. Ahole, a, corresponding in size to the hole a, is made in the piece B, and at the same distance from the pivot 01 as the hole A. The lock being open, as in Fig. 5, the end 0 of the piece B is run through the staple, and the head b brought up till it bears against the staple. The piece B is then moved around until it lays on top of the bolt-piece A, when the right-angled portion 0 will bear against, or almost so, the side of the staple. The hole a will then be found to be exactly over the hole a. I put a paper seal, 0, between the two pieces A and B, and then proceed to fasten the lock, as follows:

I have soft-metal rivets or seals y, made as shown in Fig. 6, and soft-metal washers as, also shown in Fig. 6. I push the rivet through the holes a a, one lying immediately over the other; and in so doing, I pass the rivet through the paper seal between the pieces A and B. A washer, Fig.5, is then placed over the point of the rivet, and both ends of the rivet are subjected to pressure by a suitable tool hearing any proper design for a stamp. This pressure upsets the small end of the rivet and the edge of the washer, and in a manner merges them and secures the lock, leaving a large head i on the rivet on both sides of the lock, to bear the imprint from the upsetting-tool. In this condition the bar cannot be removed from the staple without breaking it or defacing both the soft-metal and paper seals. In detail for holding and mutilating the paper seal, 1 use sub.-

stantiall y the same devices described and shown in my application for seal-lock filed of even date with this.

I do not claim, broadly, the combination of the bar B as a seal-cover with the piece A, that being covered in Letters Patent issued to me September 23, A. D. 1873; but

What I do claim as new, and desire to secure forth.

J AS. E. THOMSON.

Witnesses B. K. EVANS O. NAsn. 

